In particular, based on the observation that the rotation of each link in essence creates a linear displacement of the CM of each link, the idea is to describe the body shape changes of an underwater snake robot as linear displacements of the links with respect to each other instead of rotational displacements.
Other effects of climate change on underwater communication may include changes to signal production: in warmer temperatures, electric fish increase their rates of electric organ discharge (Silva et al. 2007).
"Locally major flooding could occur in places due to changes to underwater slopes and/or loss of protective dunes, both caused by Sandy," the flood warning reads.
Increasing temperatures and other effects of climate change have multiple cascading effects on water quality and clarity, affecting several channels of underwater communication among aquatic animals (van der Sluijs et al. 2011).
That said, there does not appear to be any sign yet of a material change in the behavior of underwater borrowers attempting to strategically default to qualify for a reduction.
But in recent decades, the marine environment has changed, and the company's thousands of underwater acres in the Great South Bay have become less productive and less critical to its business.
Whale researchers registered a 6 decibel (dB) fall in the intensity of underwater noise, with the change particularly pronounced at frequencies below 150Hz.
There is clear indication that, between different phases of underwater hand movement, when swimmer changes his hand orientation (i.e., pitch and sweepback angle) (Table 1), the changes directly affect the projected frontal area and hereupon the drag force.
To our knowledge, there is no known work based on CFD method which compares different phases of underwater front crawl hand motion with appropriate changes of hand orientation.
In this paper, the dynamic change of surface area is concentrated to improve the propulsion performance of underwater propeller.
